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Old 20th October 2017, 06:03 PM   #11
lowmass is offline lowmass  United States
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Originally Posted by Pano View Post
Now wait a minute - how can you talk about sand filled speaker walls and call yourself "Lowmass"?
Ha yea that name came years ago before age started its mass centralization effort on my mid section. I need the sand as a counter balance.
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Old 20th October 2017, 06:14 PM   #12
lowmass is offline lowmass  United States
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Many years ago Wharfdale had a speaker with sand in the walls. I would tend to use vermiculite concrete which is 15% of the weight of regular concrete.
Yep weight can be an issue for sure. The sand works so well because its not a solid riggid structure and the movement of the grains produces enough friction to develop a damping component.

I never tryed but wanted to use two tubes about 1/4 inch apart with a layer of memory foam between. Should be light, extreemly riggid, and well damped.
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Old 20th October 2017, 10:26 PM   #13
Cal Weldon is offline Cal Weldon  Canada
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Low cost speaker ideas
For that I think you could slit the inner tube, curl it tighter, insert, then force it back out against the foam and seal the slit.

Maybe yes?
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Old 22nd October 2017, 09:02 PM   #14
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It does not really matter what the speaker enclosures are made of. Car audio speakers are good quality and low cost. PC speakers even cheaper with audio and USB cables and 5 volt amplifiers for less than $6 a pair.
Tonight while chilling out, I was listening to those side firing 6x9" and front 5" speakers and the bass was awesome, out of three speaker enclosures. A mere 12" tall.
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Old 23rd October 2017, 01:51 PM   #15
Zarathu is offline Zarathu  United States
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Originally Posted by lowmass View Post
I never tryed but wanted to use two tubes about 1/4 inch apart with a layer of memory foam between. Should be light, extreemly riggid, and well damped.
What about construction insulating foam in an aerosol can?
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Old 26th October 2017, 06:41 PM   #16
boswald is online now boswald  United States
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Low cost speaker ideas
Aerosol foams are closed-cell and relatively rigid.
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Old 26th October 2017, 10:49 PM   #17
lowmass is offline lowmass  United States
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Originally Posted by Zarathu View Post
What about construction insulating foam in an aerosol can?
Actually tryed that. Problem is those foams turn to liquid if not in enough contact with air. There are two part foams that will work however. As a side note they likley are not going to damp the mid range well wich is why I wanted to try a foam similar to memory foam.
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Old 26th October 2017, 10:52 PM   #18
lowmass is offline lowmass  United States
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Originally Posted by Cal Weldon View Post
For that I think you could slit the inner tube, curl it tighter, insert, then force it back out against the foam and seal the slit.

Maybe yes?
Exactly right! very simple to build and quite hi perf I expect.

Years ago I was talking to the guy who made the "Gold Ribbon". He told me the best cabnet he ever made was two layers of mdf with a similar foam sandwiched between . I think foam from a company called EAR. Like the foam ear plug material.
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